LOL, try to supply them items in BTC.
I will see, how You will be able to change the interest from the profit to BTC.
All the bills are in local currency, just no one sell fuel in BTC.
Who will have the currency exchange risks for free?
No, you can't just simply supply them items in bitcoin. You just need to explain to them and prove that bitcoin is real and with that, it's up to them if they are going to get interested with it. We don't have to force them even though you are right their about currency exchange, everyday there is a risk and we can't guarantee it to them to be free.